🚀 go-pugleaf

In article <8902010855.AA06237@marvin.moncam.uucp> mcvax!moncam!paul@UUNET.UU.NET (Paul Hudson) writes:
++
++As before, suggestions of futher warnings welcome.
++Paul Hudson 
++

Here's a useful warning we could use in gcc and g++, given that it is now
possible to declare ``const'' functions (read gcc.texinfo for gcc 1.33
for details).

Imagine the following perverse program:

----------------------------------------
int external = 10;

int bar () {
   external++;        
}

const int foo (int *i) {
   bar();
   return (external = *i = 10);
}

void main () {
   external = foo(&external) + external;
}
----------------------------------------

Function foo violates just about all the restrictions on const
functions, since it references global variables, changes its
parameters, and calls a non-const function.  However, gcc doesn't
complain about this, yet.  It would be nice to have a -W option that
detected these transgressions.

Doug
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